<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright 2008 XBRL International. All Rights Reserved. -->
<linkbase
  xmlns="http://www.xbrl.org/2003/linkbase"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns:xlink="http://www.w3.org/1999/xlink"
  xmlns:t="http://xbrl.org/conformance/example"
  xsi:schemaLocation="
    http://www.xbrl.org/2003/linkbase 
      http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd
    http://xbrl.org/conformance/example
      331-equivalentRelationships-01.xsd
    ">
  <calculationLink xlink:type="extended"
    xlink:role="http://www.xbrl.org/2003/role/link">
    <loc xlink:type="locator"
      xlink:label="t_P1"
      xlink:href="331-equivalentRelationships-01.xsd#t_P1" />
    <loc xlink:type="locator"
      xlink:label="t_P2"
      xlink:href="331-equivalentRelationships-01.xsd#t_P2" />
    <loc xlink:type="locator"
      xlink:label="t_P3"
      xlink:href="331-equivalentRelationships-01.xsd#t_P3" />
    <calculationArc xlink:type="arc"
      xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
      xlink:from="t_P1" xlink:to="t_P2"
      order="1"
      weight="1"
      use="optional" />
    <calculationArc xlink:type="arc"
      xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
      xlink:from="t_P1" xlink:to="t_P3"
      order="1"
      weight="1"
      use="optional" 
      t:strAttr="abc"
      t:decAttr="1.23"
      t:dblAttr="4.56"
      t:boolAttr="true"
      />
  </calculationLink>
</linkbase>